Unbalance Vibration Control System of Bearingless Asynchronous Motor

Abstract

The invention provides an unbalance vibration control system of a bearingless asynchronous motor. The system consists of a directional inverse decoupling control system of a rotor flux linkage of the bearingless asynchronous motor and an unbalance exciting force feedforward compensation system, wherein the directional inverse decoupling control system of the rotor flux linkage of the bearingless asynchronous motor comprises an original system, an inverse system and four adjustors and realizes dynamic decoupling control of an electromagnetic torque, the rotor flux linkage and a random displacement component; the unbalance exciting force feedforward compensation system comprises an LMS self-adapted filter unbalance exciting force compensator and a force / flow conversion module and dynamically adjusts the unbalance displacement extraction speed and precision by using a simple step-length factor adjusting function; output of the feedforward compensation system and a steady random displacement current output by the inverse system are overlaid to form a magnetic suspension dynamic decoupling control system. The system provided by the invention cancels the links of online identification of a predictable load torque in the inverse system and a closed loop of a stator current of the original system, so that the influence of the unbalance exciting force can be effectively inhibited and the control precision and performance are improved.

Description

Technical field [0001] The invention relates to the technical field of AC motor drive and control, and is especially suitable for high-performance dynamic decoupling control of a bearingless asynchronous motor, and is a bearingless asynchronous motor unbalanced vibration control system with strong vibration suppression effect. Background technique [0002] The bearingless motor is a new type of motor suitable for high-speed operation developed in recent years. It has a wide range of application prospects in aerospace, material sealing transmission, advanced manufacturing and other fields. As a rotating drive motor, a bearingless motor will inevitably have a certain degree of rotor mass eccentricity due to uneven materials, machining accuracy, assembly errors and other reasons. When rotating, it will generate centrifugal excitation force at the same frequency as the rotation speed, resulting in rotor failure. Balance vibration or radial displacement fluctuations affect the suspens...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a two-pole suspension control system for unbalanced vibration control of four-pole bearingless asynchronous motors, so as to overcome the problems existing in the existing unbalanced vibration control technology of bearingless asynchronous motors and improve the performance of bearingless asynchronous motors. run control performance

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